Duralite Batteries and Triton Charger

[Reza]

One little update on this to make it clear.
You can discharge with either black or yellow leads. Now if your charger needs to check the battery by charging it for a split of second before it starts the discharge process then you can't do it Through the black lead since it has the reversing diode.
Triton can discharge through both leads.

Someone might ask if you can discharge through both black and yellow lead why do we need to use the black lead to our receiver, reason why is black lead will supply over 8.5 AMP where yellow is limited to 3 AMPs.

Thank you,
Reza

[FreeRider]

thanx for the clear info . another thing i wanted to ask what is the normal voltage drop with a 1 amp load when the battery if fully charged and when it is in the medium stage.

[Reza]

Hi FreeRider,

If you have a 2S2P 4000 or 4300, when fully charged should be above 7.9v under 1amp. If it's a two cell can be a little lower. It's hard to put a number of howmuch it would drop but if I were to guess 0.3-0.5v under 1amp load.

Thank you,
Reza

	Quote: Originally Posted by FreeRider
	thanx for the clear info . another thing i wanted to ask what is the normal voltage drop with a 1 amp load when the battery if fully charged and when it is in the medium stage.

[juanes1969]

Reza:
I`m trying to set up my plane with a power expander (smart-Fly) and their super regulator. Will there be any problem in soldering a deans connector instead of the black servo connector? Will the battery provide the 8.5 AMPs with the deans?
Thanks
John

Sorry, I didn`t mention the battery is a 4000 mAh redundant.

[Reza]

Hi John,

If it is a 4000 2s2p, at best it can deliver current of two times its capacity which is 8 AMP. Changing the connector only won't show a significant difference. If you were to change the whole wiring from 22 G to 16 then yes. You can't do this because you need to rewire the battery. I would suggest that you use the battery the way it is but if you need to change to Dean to be able to attach to your system then be very careful not to short the battery while the wires are bare.

Thank you,
Reza

[juanes1969]

Reza:
another question, the wiring on the battery is capable of delivering the 8 AMPS as you said but that is only the max constant discharge right? Please don`t get me wrong, I`m not trying to get more than that, the power expander will be connected to two duralite 4000mAhs batteries and the plane is only a 33% with 8 digitals and two coreless. so I will have more than enough power for it, I just hapened to have the smartfly system and wanted to use it in order to get familiar with the system for my next project.
However, I read in the duralite site that the batteries are capable of a peak discharge of 5 times their capacity, so my question is, can the wiring in the batteries handle that peak discharge? is it because the peak discharge happens only for fractions of a second?
If this is true, then will this setup be ok for a 40% airplane?
Thanks Reza,

John

[juanes1969]

One more question Reza:
If I discharge the batteries with the AccuCycle Elite, I never let it discharge under 7.2 volts(without the 1AMP load). After discharging them ti 7.2V I let them rest for about 10 minutes and then I charge them with the Duralite charger. It take about ten to eleven hours for it to charge them. I know that the charger puts 400mAhs, but the instruction say to never leave them on the charger for more than 6 hours. Is the 6 hour limit for batteries that are in use and not cycled? Is 10 hours normal for batt. discharged to 7.2V?
What happens if the discharge goes down to 7 volts... do I ruin the batt?
Thanks
John

[Reza]

Hi John,

You can discharge each cell to 3V. So if you have a 2S2P 4000 you can discharge the pack to 6v but remember they are not like NIMH or NICD and don't benefit from cycling! As a matter of fact the more you cycle them, the shorter the life span will be.

It is OK if it took 10 hours, reason why is when the charge gets close to 8.25v or so it starts putting very little current.

On the discharge rate where did you see 5 times the capacity? Batteries won't be able to supply continues current of 5 times their capacity to my knowledge maybe spike! but certainly not continuous. If your wiring is 22 g then they are rated at 2.5-3 Amp unless you are running 16 g and then have a VERY short 22 g to the receiver which I doubt that's the case.

Depending on the servos you are running on your 40% set up, 2 4000 may or may not be enough! but certainly more than enough for a 35% set up.

Thank you,
Reza

[Reza]

Also I completed my testing with Triton charger and Duralitre charger. I basically discharged the pack with triton, then fully charged it with triton, then discharged it again and it read 3739 mah.

Then I charged a fully discharged pack with Duralite charger and discharged it same way with Triton, it read 3871.

So triton does undercharge a little not much!

Regards,
Reza

[juanes1969]

Reza:
ok I´m confused now, sorry to keep asking so much but I just want to get right with this stuff.
1.-The way the batteries are shipped, they can provide 8AMPS, right?(in your last answer you stated 2.5 to 3 AMPS)
2.-If I connect them (with deans ultra connectors) to the super regulator, they will still provide 8AMPS, yes?
The 20 AMPS I was talking about is in the FAQ section of the Duralite site. It´s only for peaks, not continuous.
3.- If I have two of the 4000mAh batteries connected to the super reg. it means I´ll have 16 AMPS in any given moment for my servos...?

Thanks for your patience Reza,
ohhh one more thing, I have been reading the test you are conducting with the triton, do you think that if I´m at the field and I want to charge my duralites just a little I could use the accucycle elite at 400mAh without killing the batteries?
The reason is that I don´t like to take my duralite charger to the field just in case I drop it or something.
Thanks again,

John

[swheaton]

I believe you would double your capacity.2 4000mha would give you 8000 mha. I dont think you would double the amperage.they way its wired in the regulator?its in series not parallel i believe? if you have a 2c 4000 mha bat. like reza said you could draw 8amps of power 1000mha=1.0 amp so 4amps x 2 =8amps 2c= 2xcapacity so a 5c 4000mha would give you 20 amps hope this helps ya understand

[Reza]

Hi John,

Please find the answers right after your questions:

	Quote: Originally Posted by juanes1969
	Reza: ok I´m confused now, sorry to keep asking so much but I just want to get right with this stuff. 1.-The way the batteries are shipped, they can provide 8AMPS, right?(in your last answer you stated 2.5 to 3 AMPS) Yes, the batteries can provide 8 amps, problem is if you draw 8 amps for a long time which normally is not the case when we are flying, the leads and the 22g wire will get pretty hot to the melting point but like I said on a 35% plane you will hardly be seeing 8 amps draw for a long period of time. You can have spikes at 10-12amps but non of those last more than seconds or most likely fraction of seconds sometimes. 2.-If I connect them (with deans ultra connectors) to the super regulator, they will still provide 8AMPS, yes? Yes they will. I don't have the product knowledge of super regulator but the batteries with dean connectors will still provide you with the same amp. The 20 AMPS I was talking about is in the FAQ section of the Duralite site. It´s only for peaks, not continuous. That is correct. 3.- If I have two of the 4000mAh batteries connected to the super reg. it means I´ll have 16 AMPS in any given moment for my servos...? If the super regulator has two separate micro processor, meaning it is two separate regulator like powerbox is, then yes but if it is only one regulator that takes two battery input then you will be limited to capacity of the super regulator or the amp that battery is able to deliver which ever is smaller! So let's say your batteries can deliver 16 amps but the super regulator is actually one regulator that is rated at 10 amps(for the sake of example since I don't know anything about them) then your system will be limited to 10 amps. Therefore, if your plane draws 15 amps your regulator can get in trouble and give up! Please study the super regulator, all I said was general because I don't have the knowledge of how they work. Thanks for your patience Reza, ohhh one more thing, I have been reading the test you are conducting with the triton, do you think that if I´m at the field and I want to charge my duralites just a little I could use the accucycle elite at 400mAh without killing the batteries? No problems at all just don't fast charge them, circuit may give up! at 400 mah you should be perfectly fine The reason is that I don´t like to take my duralite charger to the field just in case I drop it or something. Thanks again, You are very welcome! John